Reduntant write bit checks

No point in checking for td_rw(td) || td_write(), since td_write()
will also be true for td_rw().

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/io_u.c b/io_u.c
index 0487857..d5dd84b 100644
--- a/io_u.c
+++ b/io_u.c
@@ -654,7 +654,7 @@
 		add_bw_sample(td, idx, &icd->time);
 		io_u_mark_latency(td, msec);
 
-		if ((td_rw(td) || td_write(td)) && idx == DDIR_WRITE &&
+		if (td_write(td) && idx == DDIR_WRITE &&
 		    td->o.verify != VERIFY_NONE)
 			log_io_piece(td, io_u);